package com.chen.syn;

import java.util.concurrent.locks.ReentrantLock;

public class TestLock {
    public static void main(String[] args) {

        TestLock2 testLock2 = new TestLock2();

        new Thread(testLock2).start();
        new Thread(testLock2).start();
        new Thread(testLock2).start();

    }
}

class TestLock2 implements Runnable{

    private int ticketNum = 10;
    // 定义Lock锁
    private final ReentrantLock lock = new ReentrantLock();

    @Override
    public void run() {
        while (true) {

            try {
                // 加锁
                lock.lock();

                if (ticketNum > 0) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(ticketNum--);
                } else {
                    break;
                }
            }finally {
                // 解锁
                lock.unlock();
            }


        }
    }
}
